have dark skin
The phrase 'dunkle Haut haben' is used in German to describe someone who has dark skin. This can refer to a natural skin tone, a tan, or a darker complexion due to sun exposure. The phrase is straightforward and does not carry any additional connotations or implications beyond the literal meaning.
She has dark skin and bright eyes.
This is a simple descriptive sentence. The verb 'hat' (has) is used to describe physical characteristics in German.
Even though he had dark skin, he burns easily in the sun.
This sentence shows a contrast. The use of 'Obwohl' (even though) sets up an expectation, and then the sentence delivers a surprising information.
I noticed that people with dark skin are rare in my city.
This sentence speaks of the speaker's observation. The verb 'bemerkte' (noticed) is used to share an observation or realization. 'Selten' means 'rare' in German.